From patchwork Thu Dec 5 16:50:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam via B4 Relay X-Patchwork-Id: 13895787 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 45C4E22577F; Thu, 5 Dec 2024 16:50:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733417450; cv=none; b=i3swu52MfnUGtCtGY6jLJAw8A7+KmgJbhJ1ysG+xLcXmQIITpbvsbklF5qLmsogbg04Msl0yvNG6u83a5kk2CTKOMz2NNFiN//Weja4ds7vljYcG/YYbNnJF7LUAH8j3ZqCd2zgKKq6hDzCl1APV8PltKNgxfLFttAu1Yjq0028= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733417450; c=relaxed/simple; bh=yAhSThl4omNIzqdvqVD2D/bE/H1pTTvDk5NNbO9mc2w=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=qipAyKyUreHAcJmvp1Dw08N5L1Bl/X5nyecySjG6sQKWLLy17W0TZbUN+kIjSfdCWd+Rd/IHGUiJiej8PZQoc19i+3tWPOELYt4678inI7imoq38+Vcwe6OchWiRXbwWi7qynpDfkYogLsxmwB5F00m578wEg/Ux/pCzFNRJkoM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iEjvSqPa; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iEjvSqPa" Received: by smtp.kernel.org (Postfix) with ESMTPS id D8415C4CEDF; Thu, 5 Dec 2024 16:50:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733417448; bh=yAhSThl4omNIzqdvqVD2D/bE/H1pTTvDk5NNbO9mc2w=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=iEjvSqPaZoOAlTu1AD0+FWzRgVIS5YXMVRbev0VhWqn07XgRgaHqoKB2DnL9tL88E C3DozHtwbDTbG/3v+JoFS1Vtc/hZs07fmE7YRtevjTxm/GfgVbRO1ETE3qqO+aS/S+ m8O3g5Z78u4aCvxnnecP/FzTEUpFO3ijjse16891SUflsWdAkserinhBNyXYRNzrKm gc6OdBA6TrzPkADmFGkscopd1yya7eaTpZU5Q+TIZ4GhnEmZ35CROvLENWSTOgJ3Be l6Jm0Z6bTCe0yUlIWY0wjSPh83fHQK4eMJXpBy9i2nWK5IDUS3xjn0mgcP+eTfn6HX 3Qx2KtbMrP5Aw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7F0CE77179; Thu, 5 Dec 2024 16:50:48 +0000 (UTC) From: Manivannan Sadhasivam via B4 Relay Date: Thu, 05 Dec 2024 22:20:29 +0530 Subject: [PATCH 2/2] cpufreq: qcom: Implement clk_ops::determine_rate() for qcom_cpufreq* clocks Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241205-qcom-cpufreq-clk-fix-v1-2-de46c82e0fe5@linaro.org> References: <20241205-qcom-cpufreq-clk-fix-v1-0-de46c82e0fe5@linaro.org> In-Reply-To: <20241205-qcom-cpufreq-clk-fix-v1-0-de46c82e0fe5@linaro.org> To: "Rafael J. Wysocki" , Viresh Kumar , Xiu Jianfeng Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , Stephen Boyd , Manivannan Sadhasivam X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=2276; i=manivannan.sadhasivam@linaro.org; h=from:subject:message-id; bh=khSFbu3Z4tQbHex/WaQQeN/MsVZBUcID3RSSj5VHwnw=; b=owEBbQGS/pANAwAKAVWfEeb+kc71AcsmYgBnUdnlCmgQOzEeIEe7CpR9509WxbQACDzYr04S7 Essu7wEu3eJATMEAAEKAB0WIQRnpUMqgUjL2KRYJ5dVnxHm/pHO9QUCZ1HZ5QAKCRBVnxHm/pHO 9W6OB/42xevWovBzxQUliFA1DFCKS9UZqAyGl84jmf7C/A8jhyBqy4qi66pl6EYQ9v9lOgFNpfJ 8Fn0sZ1kTAChcnxc7sQ3qgirhCFlMBmnksdBIlCe2cQtjxXzWw/fiAHWjvxWrbxvyYih1MuUGxy tXCEh8qPGlNiM8ks9mzllYqKLvQfDx9U1WEPbRXwglGaf5MsKpygOz4z5NOvRjbc3r8/XtABxOt q12B9GZcUgjrimiOcN5uhvySVZsnQ4bi7JFcrNtTZaYLNIBewInhHxtGVrL0HhKfpNaFllwZJl1 BHjrm8py8bfbLCF9A2mQv0k3DKdr65edXdM/ckfJXd7C129P X-Developer-Key: i=manivannan.sadhasivam@linaro.org; a=openpgp; fpr=C668AEC3C3188E4C611465E7488550E901166008 X-Endpoint-Received: by B4 Relay for manivannan.sadhasivam@linaro.org/default with auth_id=185 X-Original-From: Manivannan Sadhasivam Reply-To: manivannan.sadhasivam@linaro.org From: Manivannan Sadhasivam determine_rate() callback is used by the clk_set_rate() API to get the closest rate of the target rate supported by the clock. If this callback is not implemented (nor round_rate() callback), then the API will assume that the clock cannot set the requested rate. And since there is no parent, it will return -EINVAL. This is not an issue right now as clk_set_rate() mistakenly compares the target rate with cached rate and bails out early. But once that is fixed to compare the target rate with the actual rate of the clock (returned by recalc_rate()), then clk_set_rate() for this clock will start to fail as below: cpu cpu0: _opp_config_clk_single: failed to set clock rate: -22 So implement the determine_rate() callback that just returns the actual rate at which the clock is passed to the CPUs in a domain. Fixes: 4370232c727b ("cpufreq: qcom-hw: Add CPU clock provider support") Reported-by: Johan Hovold Closes: https://lore.kernel.org/all/20241202100621.29209-1-johan+linaro@kernel.org Suggested-by: Stephen Boyd Signed-off-by: Manivannan Sadhasivam Reviewed-by: Stephen Boyd --- drivers/cpufreq/qcom-cpufreq-hw.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index c145ab7b0bb2..b2e7e89feaac 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -626,8 +626,21 @@ static unsigned long qcom_cpufreq_hw_recalc_rate(struct clk_hw *hw, unsigned lon return __qcom_cpufreq_hw_get(data->policy) * HZ_PER_KHZ; } +/* + * Since we cannot determine the closest rate of the target rate, let's just + * return the actual rate at which the clock is running at. This is needed to + * make clk_set_rate() API work properly. + */ +static int qcom_cpufreq_hw_determine_rate(struct clk_hw *hw, struct clk_rate_request *req) +{ + req->rate = qcom_cpufreq_hw_recalc_rate(hw, 0); + + return 0; +} + static const struct clk_ops qcom_cpufreq_hw_clk_ops = { .recalc_rate = qcom_cpufreq_hw_recalc_rate, + .determine_rate = qcom_cpufreq_hw_determine_rate, }; static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)